Adding Subtracting Rational Numbers

-7.8 + (-0.8)

• 8.6

• -8.6

• 7

• -7

-23.4 - 3.4= 

• -20

• 26.8

• -26.8

• 20

6.59 + (−7.8) − (−2.41)

• 16.8

• 11.98

• -3.62

• 1.2

• 12.7

• -12.7

• 2.1

• -2.1

-7.79 + 5.4

Mathematical Equivalence

ON

- 2.09 - 15.271

• -17.361

• 13.181

• 17.361

• -13.181

The cards in Iman's hand had a value of 2.75, but then she added five −1.5 cards to her hand.  What is the new value of the cards in her hand?

Mathematical Equivalence

ON

-51 + 81.623

• 30.623

• -30.623

• 132.623

• -132.623

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